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<a name="GTlsConnection"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GTlsConnection.top_of_page"></a>GTlsConnection</span></h2>
<p>GTlsConnection — TLS connection type</p>
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<div class="refsect1">
<a name="GTlsConnection.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-set-certificate" title="g_tls_connection_set_certificate ()">g_tls_connection_set_certificate</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="returnvalue">GTlsCertificate</span></a> *
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-get-certificate" title="g_tls_connection_get_certificate ()">g_tls_connection_get_certificate</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="returnvalue">GTlsCertificate</span></a> *
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-get-peer-certificate" title="g_tls_connection_get_peer_certificate ()">g_tls_connection_get_peer_certificate</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gio-TLS-Overview.html#GTlsCertificateFlags" title="enum GTlsCertificateFlags"><span class="returnvalue">GTlsCertificateFlags</span></a>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-get-peer-certificate-errors" title="g_tls_connection_get_peer_certificate_errors ()">g_tls_connection_get_peer_certificate_errors</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-set-require-close-notify" title="g_tls_connection_set_require_close_notify ()">g_tls_connection_set_require_close_notify</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-get-require-close-notify" title="g_tls_connection_get_require_close_notify ()">g_tls_connection_get_require_close_notify</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-set-rehandshake-mode" title="g_tls_connection_set_rehandshake_mode ()">g_tls_connection_set_rehandshake_mode</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GTlsConnection.html#GTlsRehandshakeMode" title="enum GTlsRehandshakeMode"><span class="returnvalue">GTlsRehandshakeMode</span></a>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-get-rehandshake-mode" title="g_tls_connection_get_rehandshake_mode ()">g_tls_connection_get_rehandshake_mode</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-set-use-system-certdb" title="g_tls_connection_set_use_system_certdb ()">g_tls_connection_set_use_system_certdb</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-get-use-system-certdb" title="g_tls_connection_get_use_system_certdb ()">g_tls_connection_get_use_system_certdb</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GTlsDatabase.html" title="GTlsDatabase"><span class="returnvalue">GTlsDatabase</span></a> *
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-get-database" title="g_tls_connection_get_database ()">g_tls_connection_get_database</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-set-database" title="g_tls_connection_set_database ()">g_tls_connection_set_database</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GTlsInteraction.html" title="GTlsInteraction"><span class="returnvalue">GTlsInteraction</span></a> *
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-get-interaction" title="g_tls_connection_get_interaction ()">g_tls_connection_get_interaction</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-set-interaction" title="g_tls_connection_set_interaction ()">g_tls_connection_set_interaction</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-handshake" title="g_tls_connection_handshake ()">g_tls_connection_handshake</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-handshake-async" title="g_tls_connection_handshake_async ()">g_tls_connection_handshake_async</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-handshake-finish" title="g_tls_connection_handshake_finish ()">g_tls_connection_handshake_finish</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GTlsConnection.html#g-tls-connection-emit-accept-certificate" title="g_tls_connection_emit_accept_certificate ()">g_tls_connection_emit_accept_certificate</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GTlsConnection.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type">
<a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *</td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--base-io-stream" title="The “base-io-stream” property">base-io-stream</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a> *</td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--certificate" title="The “certificate” property">certificate</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="GTlsDatabase.html" title="GTlsDatabase"><span class="type">GTlsDatabase</span></a> *</td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--database" title="The “database” property">database</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="GTlsInteraction.html" title="GTlsInteraction"><span class="type">GTlsInteraction</span></a> *</td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--interaction" title="The “interaction” property">interaction</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type">
<a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a> *</td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--peer-certificate" title="The “peer-certificate” property">peer-certificate</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="gio-TLS-Overview.html#GTlsCertificateFlags" title="enum GTlsCertificateFlags"><span class="type">GTlsCertificateFlags</span></a></td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--peer-certificate-errors" title="The “peer-certificate-errors” property">peer-certificate-errors</a></td>
<td class="property_flags">Read</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="GTlsConnection.html#GTlsRehandshakeMode" title="enum GTlsRehandshakeMode"><span class="type">GTlsRehandshakeMode</span></a></td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--rehandshake-mode" title="The “rehandshake-mode” property">rehandshake-mode</a></td>
<td class="property_flags">Read / Write / Construct</td>
</tr>
<tr>
<td class="property_type"><a href="../glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--require-close-notify" title="The “require-close-notify” property">require-close-notify</a></td>
<td class="property_flags">Read / Write / Construct</td>
</tr>
<tr>
<td class="property_type"><a href="../glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td>
<td class="property_name"><a class="link" href="GTlsConnection.html#GTlsConnection--use-system-certdb" title="The “use-system-certdb” property">use-system-certdb</a></td>
<td class="property_flags">Read / Write / Construct</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GTlsConnection.signals"></a><h2>Signals</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="signals_return">
<col width="300px" class="signals_name">
<col width="200px" class="signals_flags">
</colgroup>
<tbody><tr>
<td class="signal_type"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a></td>
<td class="signal_name"><a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal">accept-certificate</a></td>
<td class="signal_flags"><a href="../gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GTlsConnection.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="GTlsConnection.html#GTlsConnection-struct" title="GTlsConnection">GTlsConnection</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GTlsConnection.html#GTlsRehandshakeMode" title="enum GTlsRehandshakeMode">GTlsRehandshakeMode</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GTlsConnection.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="../gobject-The-Base-Object-Type.html#GObject-struct">GObject</a>
    <span class="lineart">╰──</span> <a class="link" href="GIOStream.html" title="GIOStream">GIOStream</a>
        <span class="lineart">╰──</span> GTlsConnection
</pre>
</div>
<div class="refsect1">
<a name="GTlsConnection.derived-interfaces"></a><h2>Known Derived Interfaces</h2>
<p>
GTlsConnection is required by
 <a class="link" href="GTlsClientConnection.html" title="GTlsClientConnection">GTlsClientConnection</a> and  <a class="link" href="GTlsServerConnection.html" title="GTlsServerConnection">GTlsServerConnection</a>.</p>
</div>
<div class="refsect1">
<a name="GTlsConnection.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gio/gio.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="GTlsConnection.description"></a><h2>Description</h2>
<p><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> is the base TLS connection class type, which wraps
a <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> and provides TLS encryption on top of it. Its
subclasses, <a class="link" href="GTlsClientConnection.html" title="GTlsClientConnection"><span class="type">GTlsClientConnection</span></a> and <a class="link" href="GTlsServerConnection.html" title="GTlsServerConnection"><span class="type">GTlsServerConnection</span></a>,
implement client-side and server-side TLS, respectively.</p>
<p>For DTLS (Datagram TLS) support, see <a class="link" href="GDtlsConnection.html" title="GDtlsConnection"><span class="type">GDtlsConnection</span></a>.</p>
</div>
<div class="refsect1">
<a name="GTlsConnection.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="g-tls-connection-set-certificate"></a><h3>g_tls_connection_set_certificate ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_tls_connection_set_certificate (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                                  <em class="parameter"><code><a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a> *certificate</code></em>);</pre>
<p>This sets the certificate that <em class="parameter"><code>conn</code></em>
 will present to its peer
during the TLS handshake. For a <a class="link" href="GTlsServerConnection.html" title="GTlsServerConnection"><span class="type">GTlsServerConnection</span></a>, it is
mandatory to set this, and that will normally be done at construct
time.</p>
<p>For a <a class="link" href="GTlsClientConnection.html" title="GTlsClientConnection"><span class="type">GTlsClientConnection</span></a>, this is optional. If a handshake fails
with <a class="link" href="gio-TLS-Overview.html#G-TLS-ERROR-CERTIFICATE-REQUIRED:CAPS"><code class="literal">G_TLS_ERROR_CERTIFICATE_REQUIRED</code></a>, that means that the server
requires a certificate, and if you try connecting again, you should
call this method first. You can call
<a class="link" href="GTlsClientConnection.html#g-tls-client-connection-get-accepted-cas" title="g_tls_client_connection_get_accepted_cas ()"><code class="function">g_tls_client_connection_get_accepted_cas()</code></a> on the failed connection
to get a list of Certificate Authorities that the server will
accept certificates from.</p>
<p>(It is also possible that a server will allow the connection with
or without a certificate; in that case, if you don't provide a
certificate, you can tell that the server requested one by the fact
that <a class="link" href="GTlsClientConnection.html#g-tls-client-connection-get-accepted-cas" title="g_tls_client_connection_get_accepted_cas ()"><code class="function">g_tls_client_connection_get_accepted_cas()</code></a> will return
non-<a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.)</p>
<div class="refsect3">
<a name="g-tls-connection-set-certificate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>certificate</p></td>
<td class="parameter_description"><p>the certificate to use for <em class="parameter"><code>conn</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-get-certificate"></a><h3>g_tls_connection_get_certificate ()</h3>
<pre class="programlisting"><a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="returnvalue">GTlsCertificate</span></a> *
g_tls_connection_get_certificate (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>);</pre>
<p>Gets <em class="parameter"><code>conn</code></em>
's certificate, as set by
<a class="link" href="GTlsConnection.html#g-tls-connection-set-certificate" title="g_tls_connection_set_certificate ()"><code class="function">g_tls_connection_set_certificate()</code></a>.</p>
<div class="refsect3">
<a name="g-tls-connection-get-certificate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-get-certificate.returns"></a><h4>Returns</h4>
<p><em class="parameter"><code>conn</code></em>
's certificate, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-get-peer-certificate"></a><h3>g_tls_connection_get_peer_certificate ()</h3>
<pre class="programlisting"><a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="returnvalue">GTlsCertificate</span></a> *
g_tls_connection_get_peer_certificate (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>);</pre>
<p>Gets <em class="parameter"><code>conn</code></em>
's peer's certificate after the handshake has completed.
(It is not set during the emission of
<a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal"><span class="type">“accept-certificate”</span></a>.)</p>
<div class="refsect3">
<a name="g-tls-connection-get-peer-certificate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-get-peer-certificate.returns"></a><h4>Returns</h4>
<p><em class="parameter"><code>conn</code></em>
's peer's certificate, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-get-peer-certificate-errors"></a><h3>g_tls_connection_get_peer_certificate_errors ()</h3>
<pre class="programlisting"><a class="link" href="gio-TLS-Overview.html#GTlsCertificateFlags" title="enum GTlsCertificateFlags"><span class="returnvalue">GTlsCertificateFlags</span></a>
g_tls_connection_get_peer_certificate_errors
                               (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>);</pre>
<p>Gets the errors associated with validating <em class="parameter"><code>conn</code></em>
's peer's
certificate, after the handshake has completed. (It is not set
during the emission of <a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal"><span class="type">“accept-certificate”</span></a>.)</p>
<div class="refsect3">
<a name="g-tls-connection-get-peer-certificate-errors.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-get-peer-certificate-errors.returns"></a><h4>Returns</h4>
<p> <em class="parameter"><code>conn</code></em>
's peer's certificate errors</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-set-require-close-notify"></a><h3>g_tls_connection_set_require_close_notify ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_tls_connection_set_require_close_notify
                               (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                                <em class="parameter"><code><a href="../glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> require_close_notify</code></em>);</pre>
<p>Sets whether or not <em class="parameter"><code>conn</code></em>
 expects a proper TLS close notification
before the connection is closed. If this is <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> (the default),
then <em class="parameter"><code>conn</code></em>
 will expect to receive a TLS close notification from its
peer before the connection is closed, and will return a
<a class="link" href="gio-TLS-Overview.html#G-TLS-ERROR-EOF:CAPS"><code class="literal">G_TLS_ERROR_EOF</code></a> error if the connection is closed without proper
notification (since this may indicate a network error, or
man-in-the-middle attack).</p>
<p>In some protocols, the application will know whether or not the
connection was closed cleanly based on application-level data
(because the application-level data includes a length field, or is
somehow self-delimiting); in this case, the close notify is
redundant and sometimes omitted. (TLS 1.1 explicitly allows this;
in TLS 1.0 it is technically an error, but often done anyway.) You
can use <a class="link" href="GTlsConnection.html#g-tls-connection-set-require-close-notify" title="g_tls_connection_set_require_close_notify ()"><code class="function">g_tls_connection_set_require_close_notify()</code></a> to tell <em class="parameter"><code>conn</code></em>

to allow an "unannounced" connection close, in which case the close
will show up as a 0-length read, as in a non-TLS
<a class="link" href="GSocketConnection.html" title="GSocketConnection"><span class="type">GSocketConnection</span></a>, and it is up to the application to check that
the data has been fully received.</p>
<p>Note that this only affects the behavior when the peer closes the
connection; when the application calls <a class="link" href="GIOStream.html#g-io-stream-close" title="g_io_stream_close ()"><code class="function">g_io_stream_close()</code></a> itself
on <em class="parameter"><code>conn</code></em>
, this will send a close notification regardless of the
setting of this property. If you explicitly want to do an unclean
close, you can close <em class="parameter"><code>conn</code></em>
's <a class="link" href="GTlsConnection.html#GTlsConnection--base-io-stream" title="The “base-io-stream” property"><span class="type">“base-io-stream”</span></a> rather
than closing <em class="parameter"><code>conn</code></em>
 itself, but note that this may only be done when no other
operations are pending on <em class="parameter"><code>conn</code></em>
 or the base I/O stream.</p>
<div class="refsect3">
<a name="g-tls-connection-set-require-close-notify.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>require_close_notify</p></td>
<td class="parameter_description"><p>whether or not to require close notification</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-get-require-close-notify"></a><h3>g_tls_connection_get_require_close_notify ()</h3>
<pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_tls_connection_get_require_close_notify
                               (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>);</pre>
<p>Tests whether or not <em class="parameter"><code>conn</code></em>
 expects a proper TLS close notification
when the connection is closed. See
<a class="link" href="GTlsConnection.html#g-tls-connection-set-require-close-notify" title="g_tls_connection_set_require_close_notify ()"><code class="function">g_tls_connection_set_require_close_notify()</code></a> for details.</p>
<div class="refsect3">
<a name="g-tls-connection-get-require-close-notify.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-get-require-close-notify.returns"></a><h4>Returns</h4>
<p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>conn</code></em>
requires a proper TLS close
notification.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-set-rehandshake-mode"></a><h3>g_tls_connection_set_rehandshake_mode ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_tls_connection_set_rehandshake_mode (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                                       <em class="parameter"><code><a class="link" href="GTlsConnection.html#GTlsRehandshakeMode" title="enum GTlsRehandshakeMode"><span class="type">GTlsRehandshakeMode</span></a> mode</code></em>);</pre>
<p>Sets how <em class="parameter"><code>conn</code></em>
 behaves with respect to rehandshaking requests.</p>
<p><a class="link" href="GTlsConnection.html#G-TLS-REHANDSHAKE-NEVER:CAPS"><code class="literal">G_TLS_REHANDSHAKE_NEVER</code></a> means that it will never agree to
rehandshake after the initial handshake is complete. (For a client,
this means it will refuse rehandshake requests from the server, and
for a server, this means it will close the connection with an error
if the client attempts to rehandshake.)</p>
<p><a class="link" href="GTlsConnection.html#G-TLS-REHANDSHAKE-SAFELY:CAPS"><code class="literal">G_TLS_REHANDSHAKE_SAFELY</code></a> means that the connection will allow a
rehandshake only if the other end of the connection supports the
TLS <code class="literal">renegotiation_info</code> extension. This is the default behavior,
but means that rehandshaking will not work against older
implementations that do not support that extension.</p>
<p><a class="link" href="GTlsConnection.html#G-TLS-REHANDSHAKE-UNSAFELY:CAPS"><code class="literal">G_TLS_REHANDSHAKE_UNSAFELY</code></a> means that the connection will allow
rehandshaking even without the <code class="literal">renegotiation_info</code> extension. On
the server side in particular, this is not recommended, since it
leaves the server open to certain attacks. However, this mode is
necessary if you need to allow renegotiation with older client
software.</p>
<div class="refsect3">
<a name="g-tls-connection-set-rehandshake-mode.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>mode</p></td>
<td class="parameter_description"><p>the rehandshaking mode</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-get-rehandshake-mode"></a><h3>g_tls_connection_get_rehandshake_mode ()</h3>
<pre class="programlisting"><a class="link" href="GTlsConnection.html#GTlsRehandshakeMode" title="enum GTlsRehandshakeMode"><span class="returnvalue">GTlsRehandshakeMode</span></a>
g_tls_connection_get_rehandshake_mode (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>);</pre>
<p>Gets <em class="parameter"><code>conn</code></em>
 rehandshaking mode. See
<a class="link" href="GTlsConnection.html#g-tls-connection-set-rehandshake-mode" title="g_tls_connection_set_rehandshake_mode ()"><code class="function">g_tls_connection_set_rehandshake_mode()</code></a> for details.</p>
<div class="refsect3">
<a name="g-tls-connection-get-rehandshake-mode.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-get-rehandshake-mode.returns"></a><h4>Returns</h4>
<p> <em class="parameter"><code>conn</code></em>
's rehandshaking mode</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-set-use-system-certdb"></a><h3>g_tls_connection_set_use_system_certdb ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_tls_connection_set_use_system_certdb
                               (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                                <em class="parameter"><code><a href="../glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> use_system_certdb</code></em>);</pre>
<div class="warning">
<p><code class="literal">g_tls_connection_set_use_system_certdb</code> has been deprecated since version 2.30 and should not be used in newly-written code.</p>
<p>Use <a class="link" href="GTlsConnection.html#g-tls-connection-set-database" title="g_tls_connection_set_database ()"><code class="function">g_tls_connection_set_database()</code></a> instead</p>
</div>
<p>Sets whether <em class="parameter"><code>conn</code></em>
 uses the system certificate database to verify
peer certificates. This is <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> by default. If set to <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, then
peer certificate validation will always set the
<a class="link" href="gio-TLS-Overview.html#G-TLS-CERTIFICATE-UNKNOWN-CA:CAPS"><code class="literal">G_TLS_CERTIFICATE_UNKNOWN_CA</code></a> error (meaning
<a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal"><span class="type">“accept-certificate”</span></a> will always be emitted on
client-side connections, unless that bit is not set in
<a class="link" href="GTlsClientConnection.html#GTlsClientConnection--validation-flags" title="The “validation-flags” property"><span class="type">“validation-flags”</span></a>).</p>
<div class="refsect3">
<a name="g-tls-connection-set-use-system-certdb.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>use_system_certdb</p></td>
<td class="parameter_description"><p>whether to use the system certificate database</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-get-use-system-certdb"></a><h3>g_tls_connection_get_use_system_certdb ()</h3>
<pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_tls_connection_get_use_system_certdb
                               (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>);</pre>
<div class="warning">
<p><code class="literal">g_tls_connection_get_use_system_certdb</code> has been deprecated since version 2.30 and should not be used in newly-written code.</p>
<p>Use <a class="link" href="GTlsConnection.html#g-tls-connection-get-database" title="g_tls_connection_get_database ()"><code class="function">g_tls_connection_get_database()</code></a> instead</p>
</div>
<p>Gets whether <em class="parameter"><code>conn</code></em>
 uses the system certificate database to verify
peer certificates. See <a class="link" href="GTlsConnection.html#g-tls-connection-set-use-system-certdb" title="g_tls_connection_set_use_system_certdb ()"><code class="function">g_tls_connection_set_use_system_certdb()</code></a>.</p>
<div class="refsect3">
<a name="g-tls-connection-get-use-system-certdb.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-get-use-system-certdb.returns"></a><h4>Returns</h4>
<p> whether <em class="parameter"><code>conn</code></em>
uses the system certificate database</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-get-database"></a><h3>g_tls_connection_get_database ()</h3>
<pre class="programlisting"><a class="link" href="GTlsDatabase.html" title="GTlsDatabase"><span class="returnvalue">GTlsDatabase</span></a> *
g_tls_connection_get_database (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>);</pre>
<p>Gets the certificate database that <em class="parameter"><code>conn</code></em>
 uses to verify
peer certificates. See <a class="link" href="GTlsConnection.html#g-tls-connection-set-database" title="g_tls_connection_set_database ()"><code class="function">g_tls_connection_set_database()</code></a>.</p>
<div class="refsect3">
<a name="g-tls-connection-get-database.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-get-database.returns"></a><h4>Returns</h4>
<p>the certificate database that <em class="parameter"><code>conn</code></em>
uses or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-30.html#api-index-2.30">2.30</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-set-database"></a><h3>g_tls_connection_set_database ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_tls_connection_set_database (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                               <em class="parameter"><code><a class="link" href="GTlsDatabase.html" title="GTlsDatabase"><span class="type">GTlsDatabase</span></a> *database</code></em>);</pre>
<p>Sets the certificate database that is used to verify peer certificates.
This is set to the default database by default. See
<a class="link" href="GTlsBackend.html#g-tls-backend-get-default-database" title="g_tls_backend_get_default_database ()"><code class="function">g_tls_backend_get_default_database()</code></a>. If set to <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, then
peer certificate validation will always set the
<a class="link" href="gio-TLS-Overview.html#G-TLS-CERTIFICATE-UNKNOWN-CA:CAPS"><code class="literal">G_TLS_CERTIFICATE_UNKNOWN_CA</code></a> error (meaning
<a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal"><span class="type">“accept-certificate”</span></a> will always be emitted on
client-side connections, unless that bit is not set in
<a class="link" href="GTlsClientConnection.html#GTlsClientConnection--validation-flags" title="The “validation-flags” property"><span class="type">“validation-flags”</span></a>).</p>
<div class="refsect3">
<a name="g-tls-connection-set-database.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>database</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsDatabase.html" title="GTlsDatabase"><span class="type">GTlsDatabase</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-30.html#api-index-2.30">2.30</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-get-interaction"></a><h3>g_tls_connection_get_interaction ()</h3>
<pre class="programlisting"><a class="link" href="GTlsInteraction.html" title="GTlsInteraction"><span class="returnvalue">GTlsInteraction</span></a> *
g_tls_connection_get_interaction (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>);</pre>
<p>Get the object that will be used to interact with the user. It will be used
for things like prompting the user for passwords. If <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> is returned, then
no user interaction will occur for this connection.</p>
<div class="refsect3">
<a name="g-tls-connection-get-interaction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a connection</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-get-interaction.returns"></a><h4>Returns</h4>
<p>The interaction object. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-30.html#api-index-2.30">2.30</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-set-interaction"></a><h3>g_tls_connection_set_interaction ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_tls_connection_set_interaction (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                                  <em class="parameter"><code><a class="link" href="GTlsInteraction.html" title="GTlsInteraction"><span class="type">GTlsInteraction</span></a> *interaction</code></em>);</pre>
<p>Set the object that will be used to interact with the user. It will be used
for things like prompting the user for passwords.</p>
<p>The <em class="parameter"><code>interaction</code></em>
 argument will normally be a derived subclass of
<a class="link" href="GTlsInteraction.html" title="GTlsInteraction"><span class="type">GTlsInteraction</span></a>. <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> can also be provided if no user interaction
should occur for this connection.</p>
<div class="refsect3">
<a name="g-tls-connection-set-interaction.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a connection</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>interaction</p></td>
<td class="parameter_description"><p>an interaction object, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-30.html#api-index-2.30">2.30</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-handshake"></a><h3>g_tls_connection_handshake ()</h3>
<pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_tls_connection_handshake (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                            <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                            <em class="parameter"><code><a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Attempts a TLS handshake on <em class="parameter"><code>conn</code></em>
.</p>
<p>On the client side, it is never necessary to call this method;
although the connection needs to perform a handshake after
connecting (or after sending a "STARTTLS"-type command) and may
need to rehandshake later if the server requests it,
<a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> will handle this for you automatically when you try
to send or receive data on the connection. However, you can call
<a class="link" href="GTlsConnection.html#g-tls-connection-handshake" title="g_tls_connection_handshake ()"><code class="function">g_tls_connection_handshake()</code></a> manually if you want to know for sure
whether the initial handshake succeeded or failed (as opposed to
just immediately trying to write to <em class="parameter"><code>conn</code></em>
's output stream, in which
case if it fails, it may not be possible to tell if it failed
before or after completing the handshake).</p>
<p>Likewise, on the server side, although a handshake is necessary at
the beginning of the communication, you do not need to call this
function explicitly unless you want clearer error reporting.
However, you may call <a class="link" href="GTlsConnection.html#g-tls-connection-handshake" title="g_tls_connection_handshake ()"><code class="function">g_tls_connection_handshake()</code></a> later on to
renegotiate parameters (encryption methods, etc) with the client.</p>
<p><a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal"><span class="type">“accept_certificate”</span></a> may be emitted during the
handshake.</p>
<div class="refsect3">
<a name="g-tls-connection-handshake.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p>a <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a>, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>a <a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a>, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-handshake.returns"></a><h4>Returns</h4>
<p> success or failure</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-handshake-async"></a><h3>g_tls_connection_handshake_async ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_tls_connection_handshake_async (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                                  <em class="parameter"><code><span class="type">int</span> io_priority</code></em>,
                                  <em class="parameter"><code><a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a> *cancellable</code></em>,
                                  <em class="parameter"><code><a class="link" href="GAsyncResult.html#GAsyncReadyCallback" title="GAsyncReadyCallback ()"><span class="type">GAsyncReadyCallback</span></a> callback</code></em>,
                                  <em class="parameter"><code><a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>Asynchronously performs a TLS handshake on <em class="parameter"><code>conn</code></em>
. See
<a class="link" href="GTlsConnection.html#g-tls-connection-handshake" title="g_tls_connection_handshake ()"><code class="function">g_tls_connection_handshake()</code></a> for more information.</p>
<div class="refsect3">
<a name="g-tls-connection-handshake-async.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>io_priority</p></td>
<td class="parameter_description"><p>the <a class="link" href="GAsyncResult.html#io-priority" title="I/O Priority">I/O priority</a> of the request</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>cancellable</p></td>
<td class="parameter_description"><p>a <a class="link" href="GCancellable.html" title="GCancellable"><span class="type">GCancellable</span></a>, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>callback</p></td>
<td class="parameter_description"><p>callback to call when the handshake is complete</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>the data to pass to the callback function</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-handshake-finish"></a><h3>g_tls_connection_handshake_finish ()</h3>
<pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_tls_connection_handshake_finish (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                                   <em class="parameter"><code><a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a> *result</code></em>,
                                   <em class="parameter"><code><a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **error</code></em>);</pre>
<p>Finish an asynchronous TLS handshake operation. See
<a class="link" href="GTlsConnection.html#g-tls-connection-handshake" title="g_tls_connection_handshake ()"><code class="function">g_tls_connection_handshake()</code></a> for more information.</p>
<div class="refsect3">
<a name="g-tls-connection-handshake-finish.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>result</p></td>
<td class="parameter_description"><p>a <a class="link" href="GAsyncResult.html" title="GAsyncResult"><span class="type">GAsyncResult</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>a <a href="../glib-Error-Reporting.html#GError"><span class="type">GError</span></a> pointer, or <a href="../glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-handshake-finish.returns"></a><h4>Returns</h4>
<p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> on success, <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> on failure, in which
case <em class="parameter"><code>error</code></em>
will be set.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="g-tls-connection-emit-accept-certificate"></a><h3>g_tls_connection_emit_accept_certificate ()</h3>
<pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_tls_connection_emit_accept_certificate
                               (<em class="parameter"><code><a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> *conn</code></em>,
                                <em class="parameter"><code><a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a> *peer_cert</code></em>,
                                <em class="parameter"><code><a class="link" href="gio-TLS-Overview.html#GTlsCertificateFlags" title="enum GTlsCertificateFlags"><span class="type">GTlsCertificateFlags</span></a> errors</code></em>);</pre>
<p>Used by <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a> implementations to emit the
<a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal"><span class="type">“accept-certificate”</span></a> signal.</p>
<div class="refsect3">
<a name="g-tls-connection-emit-accept-certificate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>peer_cert</p></td>
<td class="parameter_description"><p>the peer's <a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>errors</p></td>
<td class="parameter_description"><p>the problems with <em class="parameter"><code>peer_cert</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="g-tls-connection-emit-accept-certificate.returns"></a><h4>Returns</h4>
<p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if one of the signal handlers has returned
<a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> to accept <em class="parameter"><code>peer_cert</code></em>
</p>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
</div>
<div class="refsect1">
<a name="GTlsConnection.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GTlsConnection-struct"></a><h3>GTlsConnection</h3>
<pre class="programlisting">typedef struct _GTlsConnection GTlsConnection;</pre>
<p>Abstract base class for the backend-specific <a class="link" href="GTlsClientConnection.html" title="GTlsClientConnection"><span class="type">GTlsClientConnection</span></a>
and <a class="link" href="GTlsServerConnection.html" title="GTlsServerConnection"><span class="type">GTlsServerConnection</span></a> types.</p>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsRehandshakeMode"></a><h3>enum GTlsRehandshakeMode</h3>
<p>When to allow rehandshaking. See
<a class="link" href="GTlsConnection.html#g-tls-connection-set-rehandshake-mode" title="g_tls_connection_set_rehandshake_mode ()"><code class="function">g_tls_connection_set_rehandshake_mode()</code></a>.</p>
<div class="refsect3">
<a name="GTlsRehandshakeMode.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="G-TLS-REHANDSHAKE-NEVER:CAPS"></a>G_TLS_REHANDSHAKE_NEVER</p></td>
<td class="enum_member_description">
<p>Never allow rehandshaking</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-TLS-REHANDSHAKE-SAFELY:CAPS"></a>G_TLS_REHANDSHAKE_SAFELY</p></td>
<td class="enum_member_description">
<p>Allow safe rehandshaking only</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="G-TLS-REHANDSHAKE-UNSAFELY:CAPS"></a>G_TLS_REHANDSHAKE_UNSAFELY</p></td>
<td class="enum_member_description">
<p>Allow unsafe rehandshaking</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
</div>
<div class="refsect1">
<a name="GTlsConnection.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GTlsConnection--base-io-stream"></a><h3>The <code class="literal">“base-io-stream”</code> property</h3>
<pre class="programlisting">  “base-io-stream”           <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> *</pre>
<p>The <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> that the connection wraps. The connection holds a reference
to this stream, and may run operations on the stream from other threads
throughout its lifetime. Consequently, after the <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> has been
constructed, application code may only run its own operations on this
stream when no <a class="link" href="GIOStream.html" title="GIOStream"><span class="type">GIOStream</span></a> operations are running.</p>
<p>Flags: Read / Write / Construct Only</p>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsConnection--certificate"></a><h3>The <code class="literal">“certificate”</code> property</h3>
<pre class="programlisting">  “certificate”              <a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a> *</pre>
<p>The connection's certificate; see
<a class="link" href="GTlsConnection.html#g-tls-connection-set-certificate" title="g_tls_connection_set_certificate ()"><code class="function">g_tls_connection_set_certificate()</code></a>.</p>
<p>Flags: Read / Write</p>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsConnection--database"></a><h3>The <code class="literal">“database”</code> property</h3>
<pre class="programlisting">  “database”                 <a class="link" href="GTlsDatabase.html" title="GTlsDatabase"><span class="type">GTlsDatabase</span></a> *</pre>
<p>The certificate database to use when verifying this TLS connection.
If no certificate database is set, then the default database will be
used. See <a class="link" href="GTlsBackend.html#g-tls-backend-get-default-database" title="g_tls_backend_get_default_database ()"><code class="function">g_tls_backend_get_default_database()</code></a>.</p>
<p>Flags: Read / Write</p>
<p class="since">Since: <a class="link" href="api-index-2-30.html#api-index-2.30">2.30</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsConnection--interaction"></a><h3>The <code class="literal">“interaction”</code> property</h3>
<pre class="programlisting">  “interaction”              <a class="link" href="GTlsInteraction.html" title="GTlsInteraction"><span class="type">GTlsInteraction</span></a> *</pre>
<p>A <a class="link" href="GTlsInteraction.html" title="GTlsInteraction"><span class="type">GTlsInteraction</span></a> object to be used when the connection or certificate
database need to interact with the user. This will be used to prompt the
user for passwords where necessary.</p>
<p>Flags: Read / Write</p>
<p class="since">Since: <a class="link" href="api-index-2-30.html#api-index-2.30">2.30</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsConnection--peer-certificate"></a><h3>The <code class="literal">“peer-certificate”</code> property</h3>
<pre class="programlisting">  “peer-certificate”         <a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a> *</pre>
<p>The connection's peer's certificate, after the TLS handshake has
completed and the certificate has been accepted. Note in
particular that this is not yet set during the emission of
<a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal"><span class="type">“accept-certificate”</span></a>.</p>
<p>(You can watch for a <a href="../gobject-The-Base-Object-Type.html#GObject-notify"><span class="type">“notify”</span></a> signal on this property to
detect when a handshake has occurred.)</p>
<p>Flags: Read</p>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsConnection--peer-certificate-errors"></a><h3>The <code class="literal">“peer-certificate-errors”</code> property</h3>
<pre class="programlisting">  “peer-certificate-errors”  <a class="link" href="gio-TLS-Overview.html#GTlsCertificateFlags" title="enum GTlsCertificateFlags"><span class="type">GTlsCertificateFlags</span></a></pre>
<p>The errors noticed-and-ignored while verifying
<a class="link" href="GTlsConnection.html#GTlsConnection--peer-certificate" title="The “peer-certificate” property"><span class="type">“peer-certificate”</span></a>. Normally this should be 0, but
it may not be if <a class="link" href="GTlsClientConnection.html#GTlsClientConnection--validation-flags" title="The “validation-flags” property"><span class="type">“validation-flags”</span></a> is not
<a class="link" href="gio-TLS-Overview.html#G-TLS-CERTIFICATE-VALIDATE-ALL:CAPS"><code class="literal">G_TLS_CERTIFICATE_VALIDATE_ALL</code></a>, or if
<a class="link" href="GTlsConnection.html#GTlsConnection-accept-certificate" title="The “accept-certificate” signal"><span class="type">“accept-certificate”</span></a> overrode the default
behavior.</p>
<p>Flags: Read</p>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsConnection--rehandshake-mode"></a><h3>The <code class="literal">“rehandshake-mode”</code> property</h3>
<pre class="programlisting">  “rehandshake-mode”         <a class="link" href="GTlsConnection.html#GTlsRehandshakeMode" title="enum GTlsRehandshakeMode"><span class="type">GTlsRehandshakeMode</span></a></pre>
<p>The rehandshaking mode. See
<a class="link" href="GTlsConnection.html#g-tls-connection-set-rehandshake-mode" title="g_tls_connection_set_rehandshake_mode ()"><code class="function">g_tls_connection_set_rehandshake_mode()</code></a>.</p>
<p>Flags: Read / Write / Construct</p>
<p>Default value: G_TLS_REHANDSHAKE_SAFELY</p>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsConnection--require-close-notify"></a><h3>The <code class="literal">“require-close-notify”</code> property</h3>
<pre class="programlisting">  “require-close-notify”     <a href="../glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre>
<p>Whether or not proper TLS close notification is required.
See <a class="link" href="GTlsConnection.html#g-tls-connection-set-require-close-notify" title="g_tls_connection_set_require_close_notify ()"><code class="function">g_tls_connection_set_require_close_notify()</code></a>.</p>
<p>Flags: Read / Write / Construct</p>
<p>Default value: TRUE</p>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GTlsConnection--use-system-certdb"></a><h3>The <code class="literal">“use-system-certdb”</code> property</h3>
<pre class="programlisting">  “use-system-certdb”        <a href="../glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre>
<p>Whether or not the system certificate database will be used to
verify peer certificates. See
<a class="link" href="GTlsConnection.html#g-tls-connection-set-use-system-certdb" title="g_tls_connection_set_use_system_certdb ()"><code class="function">g_tls_connection_set_use_system_certdb()</code></a>.</p>
<div class="warning">
<p><code class="literal">GTlsConnection:use-system-certdb</code> has been deprecated since version 2.30 and should not be used in newly-written code.</p>
<p>Use GTlsConnection:database instead</p>
</div>
<p>Flags: Read / Write / Construct</p>
<p>Default value: TRUE</p>
</div>
</div>
<div class="refsect1">
<a name="GTlsConnection.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GTlsConnection-accept-certificate"></a><h3>The <code class="literal">“accept-certificate”</code> signal</h3>
<pre class="programlisting"><a href="../glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
user_function (<a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a>      *conn,
               <a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a>     *peer_cert,
               <a class="link" href="gio-TLS-Overview.html#GTlsCertificateFlags" title="enum GTlsCertificateFlags"><span class="type">GTlsCertificateFlags</span></a> errors,
               <a href="../glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a>             user_data)</pre>
<p>Emitted during the TLS handshake after the peer certificate has
been received. You can examine <em class="parameter"><code>peer_cert</code></em>
's certification path by
calling <a class="link" href="GTlsCertificate.html#g-tls-certificate-get-issuer" title="g_tls_certificate_get_issuer ()"><code class="function">g_tls_certificate_get_issuer()</code></a> on it.</p>
<p>For a client-side connection, <em class="parameter"><code>peer_cert</code></em>
 is the server's
certificate, and the signal will only be emitted if the
certificate was not acceptable according to <em class="parameter"><code>conn</code></em>
's
<a class="link" href="GTlsClientConnection.html#GTlsClientConnection--validation-flags" title="The “validation-flags” property"><span class="type">“validation_flags”</span></a>. If you would like the
certificate to be accepted despite <em class="parameter"><code>errors</code></em>
, return <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> from the
signal handler. Otherwise, if no handler accepts the certificate,
the handshake will fail with <a class="link" href="gio-TLS-Overview.html#G-TLS-ERROR-BAD-CERTIFICATE:CAPS"><code class="literal">G_TLS_ERROR_BAD_CERTIFICATE</code></a>.</p>
<p>For a server-side connection, <em class="parameter"><code>peer_cert</code></em>
 is the certificate
presented by the client, if this was requested via the server's
<a class="link" href="GTlsServerConnection.html#GTlsServerConnection--authentication-mode" title="The “authentication-mode” property"><span class="type">“authentication_mode”</span></a>. On the server side,
the signal is always emitted when the client presents a
certificate, and the certificate will only be accepted if a
handler returns <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>.</p>
<p>Note that if this signal is emitted as part of asynchronous I/O
in the main thread, then you should not attempt to interact with
the user before returning from the signal handler. If you want to
let the user decide whether or not to accept the certificate, you
would have to return <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> from the signal handler on the first
attempt, and then after the connection attempt returns a
<a class="link" href="gio-TLS-Overview.html#G-TLS-ERROR-HANDSHAKE:CAPS"><code class="literal">G_TLS_ERROR_HANDSHAKE</code></a>, you can interact with the user, and if
the user decides to accept the certificate, remember that fact,
create a new connection, and return <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> from the signal handler
the next time.</p>
<p>If you are doing I/O in another thread, you do not
need to worry about this, and can simply block in the signal
handler until the UI thread returns an answer.</p>
<div class="refsect3">
<a name="GTlsConnection-accept-certificate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>conn</p></td>
<td class="parameter_description"><p>a <a class="link" href="GTlsConnection.html" title="GTlsConnection"><span class="type">GTlsConnection</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>peer_cert</p></td>
<td class="parameter_description"><p>the peer's <a class="link" href="GTlsCertificate.html" title="GTlsCertificate"><span class="type">GTlsCertificate</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>errors</p></td>
<td class="parameter_description"><p>the problems with <em class="parameter"><code>peer_cert</code></em>
.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="GTlsConnection-accept-certificate.returns"></a><h4>Returns</h4>
<p> <a href="../glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> to accept <em class="parameter"><code>peer_cert</code></em>
(which will also
immediately end the signal emission). <a href="../glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> to allow the signal
emission to continue, which will cause the handshake to fail if
no one else overrides it.</p>
</div>
<p>Flags: <a href="../gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS">Run Last</a></p>
<p class="since">Since: <a class="link" href="api-index-2-28.html#api-index-2.28">2.28</a></p>
</div>
</div>
</div>
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